JP5816790B2 - Wood flooring - Google Patents

Description

  The present invention relates to a flooring material, and more particularly to a wooden flooring material obtained by sticking a face material such as a veneer or a surface decorative sheet to the surface of a wooden base material.

  In recent years, in the residential field, wooden floor materials are easy to clean, etc., and have the advantage of suppressing the occurrence of ticks that are a cause of sick house syndrome. Its use is expanding.

  However, with the depletion of timber resources worldwide, it has become difficult to obtain solid timber, and the price is also rising. Adds a synthetic resin adhesive as a binder and heat-pressure-molds medium-density fiberboard (MDF), wood chips, bark, etc., finely crushed into chips or flakes with the above-mentioned synthetic resin adhesive in a hot-pressure form A wood board such as a particle board (PC) is known.

  Alternatively, various materials such as plywood made by laminating and adhering thin single veneers of wood to each other under heat pressure, and laminated wood are used as the wooden base material. It is often used as a wooden flooring for flooring by attaching a surface decorative material such as a synthetic resin sheet printed on wood grain, strong paper, or a veneer.

  As a method for producing a wood fiber board such as the MDF, there is known a method in which a wood fiber material mixed with a phenol resin adhesive is hot pressed. However, since the phenolic resin is strongly alkaline, a veneer or decorative paper used as a face material when a face material such as a surface decorative material is attached to a wood fiber board in which the phenolic resin is used as a binder. There is a problem of causing alkali contamination, such as discoloration of water or color extraction liquid when wet.

  In order to solve the above-described problem, Japanese Patent Application Laid-Open No. 2005-169800 discloses that when manufacturing a wood fiber board using a water-soluble alkali phenol resin as an adhesive for wood fibers, the water-soluble alkali phenol system for wood fibers. There is disclosed a method for producing a wood fiber board, characterized in that 3.0% by weight or more, preferably 3.5 to 5.5% by weight of an acid salt is added and mixed together with a resin, followed by hot pressing.

  And the pH value of the wood fiber board obtained after hot press molding can be suppressed to about 4.0-8.0, and the degree of the alkali contamination with respect to the veneer used for surface decoration and a decorative paper can be reduced significantly. The effect is described as being possible.

  On the other hand, JP-A-10-278013 discloses a woody material such as particle board or fiber board obtained by applying a formalin adhesive to a wood chip or wood fiber to form a forming mat and hot-pressing it to a predetermined thickness. In a method for producing a board, such as plywood, obtained by laminating a board or a plurality of single plates with a formalin adhesive interposed therebetween, and hot-press bonding, borax is added to the formalin adhesive for the wooden board. A method for producing a wooden board having a formaldehyde emission amount of 1.5 mg / l or less, characterized by adding an insecticidal or fungicidal agent of a boric acid type or boric acid type is disclosed.

  The amount of formaldehyde emitted from the flooring using wood board obtained by the above method is reduced, the environmental pollution problem is suppressed, the influence on the human body is reduced, and borax, boric acid or their reaction It is stated that the effect of the compound improves the insect and mold resistance of the wooden board.

  Japanese Patent Application Laid-Open No. 57-111005 discloses a mordanting and dyeing process in which a veneer is dyed with a mordanting dye and then mordanted with a mordant and an adhesive containing a chelating reagent that forms a water-soluble chelate compound. And a slicing step of slicing the assembled flitch from a predetermined direction intersecting the laminated surface. A method for manufacturing a veneer is disclosed.

  The decorative veneer obtained by the above method has a uniform dyeing degree from the surface layer portion to the inner layer portion of the material veneer, and faithfully follows the grain pattern of natural wood, such as a teak pattern. The effect is described as being reproducible.

  However, by any of the above techniques, when a surface decorative material is attached to a wooden board or plywood using a synthetic resin adhesive, in particular, a phenolic resin as an adhesive, the veneer as a surface decorative material due to its strong alkalinity. It is not sufficient to solve the problem of causing alkaline contamination such as discoloration of decorative paper or decorative paper, or generation of a colored extract when wet.

JP 2005-169800 A Japanese Patent Laid-Open No. 10-278013 JP-A-57-113005

  The present invention has been made in view of the above-mentioned background art, and its purpose is a black color caused by alkali contained in the above-mentioned adhesive on a face material to be attached to the surface or back surface of a base material such as a wooden board or plywood. An object of the present invention is to provide a wooden floor material excellent in design that prevents alkali contamination such as conversion to black or black and does not cause discoloration of the face material due to generation of mold.

In order to solve the above problem, wood flooring according to the invention described in the claims 1, having a base material and the back side of the plywood laminate bonded to wood board and veneer on the surface side is formed by bonding that the wood flooring, 0.1% to 10% of ammonium chloride to the respective adhesive for adhering the phenolic resin adhesive and the wooden board and the plywood used as a binder in the production of the wooden board, 10 % Of chelating agent and 0.1 to 10% of fungicide are added.

  The wood board is a particle board (PC) formed by finely pulverizing medium density fiberboard (MDF), wood chips, bark or the like into chips or flakes together with the synthetic resin-based adhesive, or a board. An OSB (orientation board) obtained by giving directionality to a thin and long piece of wood called a strand so as to be orthogonal to each other and compression molding with an adhesive can be used.

  Moreover, as the adhesive used as the binder, a thermosetting resin that cures under heat and pressure is used, and a polyester resin, a vinyl ester resin, a thermosetting acrylic resin alone, or a mixed system of two or more of these. Can be used.

  For example, a polyester resin is synthesized as a thermosetting resin by a condensation reaction of an unsaturated dibasic acid such as maleic anhydride and a saturated dibasic acid such as phthalic anhydride with glycols, Examples thereof include those having an unsaturated bond and an ester bond. Usually, these resins are blended with a styrene monomer, an acrylic monomer or the like as a cross-linking agent, and are called so-called unsaturated polyester resins.

  As the vinyl ester resin, a bisphenol type vinyl ester resin, a novolac type vinyl ester resin, or a mixture of both can be used.

  Thermosetting acrylic resins are usually called thermosetting acrylic syrup composed of methyl methacrylate monomer, polyfunctional acrylic monomer or prepolymer, or a mixture of two or more of each of polymers. However, the form is not particularly limited.

  The above polyester resin, vinyl ester resin, and thermosetting acrylic resin can be used as a mixture of two or more types, and the properties of each resin and the interaction with the filler or the desired product quality Used with an optimal formulation.

  Ammonium chloride, which is an acidic salt, is usually used as an aqueous solution and is added so as to have a ratio of 0.1 to 10% with respect to the adhesive in terms of solid content. Moreover, as a chelating agent, EDTA (ethylenediaminetetraacetic acid), NTA (nitrilotriacetic acid), etc. are used, and it adds as aqueous solution so that it may become a ratio of 10% or more in conversion of solid content with respect to the said adhesive agent.

  Further, as the fungicide, organic iodine fungicide, borax or boric acid insect and fungicide are used, and these fungicides are 0.1 to 0.5% with respect to the adhesive. It is added so that it may become a ratio.

  The wooden flooring according to the present invention described in claim 2 is 0.1% to 10% in the adhesive for fixing the face material to the front surface or the back surface of the base material in the wooden flooring according to claim 1 of the present application. Ammonium chloride, 10% or more chelating agent, and 0.1 to 10% fungicide are added.

  When the above-mentioned face material is a surface decorative material, for example, use a rotary lace to peel off softwood such as pine, cedar, hinoki and tsuga, or hardwood logs such as oak, hippopotamus and beech. A thin sliced veneer can be raised. In addition, synthetic resin sheets and strong paper on which wood grain, marble, granite-like patterns and pastel colors are printed are also used.

  When the face material adhered to the back surface of the base material is a backing material, thin plywood, Japanese paper, nonwoven fabric, and the like can be used.

  Examples of the adhesive used to fix the face material to the front surface or the back surface of the substrate include, for example, an SBR adhesive, a vinyl acetate adhesive, an ethylene-vinyl acetate adhesive, a melamine adhesive, and a urea resin adhesive. A known emulsion adhesive that can be applied with a roll coater or a spreader is preferably used.

  In the wooden flooring according to the invention of claim 1, for example, a wooden board using a phenolic resin adhesive as a binder, a wooden flooring using a plywood obtained by laminating and bonding a single board as a base material. Even in the case of manufacturing, by adding 0.1 to 10% ammonium chloride, 10% or more chelating agent, and 0.1 to 10% anti-fungal agent to the adhesive, surface cosmetics and backing materials It is possible to prevent occurrence of alkali contamination, for example, discoloration such as blackening, in the face material such as.

  In the wood flooring according to the invention of claim 2 of the present invention, 0.1 to 10% ammonium chloride, 10% or more chelating agent, 0% to the adhesive used to fix the face material to the front surface or back surface of the base material, 0 0.1% to 10% anti-fungal agent added to the veneer and surface decorative material, as well as thin plywood, Japanese paper, non-woven fabric and other surface materials used for backing the back surface, such as black The occurrence of discoloration such as discoloration can be prevented.

  In addition, the addition of the antifungal agent can prevent the generation of mold due to moisture, moisture, etc., and can provide a wooden flooring that has excellent dimensional stability and improved design.

  Hereinafter, the wood flooring according to the present invention will be described in detail by way of examples together with its production method.

  Wood fibers such as pine, cedar and cypress were made into chips in accordance with the normal MDF production conditions to produce wood fibers, and a resol type phenolic resin adhesive was added as a binder and mixed with wood fibers. At this time, the resol type phenolic resin adhesive is preliminarily provided with an EDTA aqueous solution so that ammonium chloride has a ratio of 10%, and EDTA has a ratio of 10% in terms of solid content, and an antifungal agent has a ratio of 10%. % Of each was added.

  The mixture was set in a hot press, and MDF was hot pressed under normal MDF hot press forming conditions to produce an MDF as a base material for a wood floor with a thickness of 5 mm and a specific gravity of 0.7.

  Next, a thin plywood having a thickness of 3 mm was adhered to the back surface of the MDF with a vinyl acetate adhesive and backing. At this time, the EDTA aqueous solution is added to the vinyl acetate adhesive in advance so that the proportion of ammonium chloride is 10%, the proportion of EDTA is 10% in terms of solid content, and the proportion of fungicide is 10%. Each was added so as to be applied to the MDF.

  Further, a vinyl acetate adhesive was applied to the surface of the MDF, and a 0.3 mm thick oak veneer was adhered to bond the surface decorative material. At this time, the EDTA aqueous solution is added to the vinyl acetate adhesive in advance so that the proportion of ammonium chloride is 10%, the proportion of EDTA is 10% in terms of solid content, and the proportion of fungicide is 10%. It added so that it might become. Here, the hot pressure conditions were a temperature of 70 to 150 ° C. and a pressure of 0.5 to 1.5 MPa, and general hot pressure conditions were maintained for 30 to 90 seconds.

  Then, the surface of the oak veneer adhered to the substrate was further colored with a colorant, and finish-coated. As the colorant, a transparent synthetic resin paint such as amino alkyd resin, vinyl resin, acrylic resin, epoxy resin, polyurethane resin, unsaturated polyester resin, isocyanate, etc. alone or arbitrarily modified Based on the synthetic resin paint, it was painted with a light brown dye to faithfully reproduce the oak grain pattern with a nearly uniform color tone.

  At this time, in the colorant, the aqueous EDTA solution has a ratio of 10% in terms of solid content, and the fungicide has a ratio of 10% so that ammonium chloride has a ratio of 10% in advance. Were added respectively.

  Furthermore, an ultraviolet curable paint such as an acrylic resin paint, an amino alkyd resin paint, or a urethane resin paint was applied on the colored coating film, and a clear or semi-clear protective film was formed by irradiating with ultraviolet rays. . By doing in this way, the impact resistance of the wooden flooring according to the present invention was improved.

  In addition, although embodiment mentioned above described the example using MDF as a wooden base material, it is not restricted to MDF, You may use wooden boards, such as a particle board. Further, a thick plywood may be used.

  Moreover, although the said Example is an example which stuck the face material to the front and back of a base material, it is not limited to this, You may stick the face material as a surface cosmetic material only on the surface. Or it is good also as a wooden floor material which affixed backing material only on the back surface and finished the surface in the cork style. Thus, the wooden flooring according to the present invention can be freely changed in design and belongs to the technical scope of the present invention unless departing from the scope of the claims.

Claims (2)

In wooden flooring that having a substrate and the back side of the plywood the wood board and veneer surface side is laminated and adhered, which are bonded, a phenolic resin adhesive used as a binder in the production of the wooden board And a wooden floor obtained by adding 0.1 to 10% ammonium chloride, 10% or more chelating agent, and 0.1 to 10% fungicidal agent to each of the adhesives for bonding the wooden board and the plywood. Wood.   It is formed by adding 0.1 to 10% ammonium chloride, 10% or more chelating agent, and 0.1 to 10% antifungal agent to the adhesive for fixing the face material to the front surface or the back surface of the base material. The wooden flooring according to claim 1.